John Dezso Ratzenberger is an American actor, voice actor, director, producer, writer and entrepreneur. He is one of the most successful actors of all time in terms of box-office receipts. Ratzenberger is best known for portraying Cliff Clavin on the popular comedy series Cheers, for which he earned two Primetime Emmy nominations. He is the only voice actor to appear in every Pixar Animation Studios feature film, including Hamm in the Toy Story franchise, The Underminer in The Incredibles franchise, and Mack in the Cars franchise.

Ratzenberger began his entertainment career while living in London in the 1970s. He had minor film and television roles throughout the late 70s and early 1980s before creating, and then landing, the role of the know-it-all mailman Cliff Clavin on Cheers, a role he portrayed throughout the show's eleven seasons. His first Pixar role was the voice of Hamm in Toy Story, and he has voiced Pixar characters in films and video games ever since. From 2004 to 2008 he hosted the TV documentary series Made in America. Outside of acting, he has promoted American entrepreneurship and manufacturing, and campaigned for several Republican candidates.

约翰·德索·拉岑伯格是美国演员、配音演员、导演、制片人、作家和企业家。就票房收入而言，他是有史以来最成功的演员之一。拉岑伯格最出名的是在流行的喜剧系列《干杯》中饰演克里夫·克拉文，为此他获得了两项黄金时段艾美奖提名。他是唯一一位出现在皮克斯动画工作室每部故事片中的配音演员，包括《玩具总动员》系列中的哈姆、《超人总动员》系列中的破坏者以及《汽车总动员》系列中的麦克。

拉岑伯格于 1970 年代在伦敦生活时开始了他的娱乐生涯。他在 70 年代末和 1980 年代初担任过一些小的电影和电视角色，然后在《干杯》中创造了无所不知的邮递员克里夫·克拉文 （Cliff Clavin） 的角色，他在该剧的 11 季中扮演了这个角色。他的第一个皮克斯角色是在《玩具总动员》中为哈姆配音，从那时起，他就在电影和视频游戏中为皮克斯角色配音。从2004年到2008年，他主持了电视纪录片系列《美国制造》。在演戏之外，他还促进了美国的创业和制造业，并为几位共和党候选人竞选。